Scaffolding couplers belong to the building construction components. Its main use is to connect the scaffolding, relying on the friction between the connector and the steel pipe to transfer the load. Widely used in various sizes of construction sites, it plays a greater role in the auxiliary aspect. Because there are initial defects in the scaffolding structure, such as the initial bending of the bars, load eccentricity, etc. are large. Therefore, we need to use scaffolding couplers to stabilize the scaffold.